Aperture forming mold for molded structures



Feb. 23, 1965 c. NEEsE 3,170,216

APERTURE FORMING MOLD FOR MOLDED STRUCTURES Filed Nov. 15, 196s INVENTORChar/es H Neese ATTORNEYS United States Patent O 179,216 APERTURE FRMENGMIG-LD EUR MQLDED STRUCTURES Charles H. Neese, 7801 Layton Drive,Springfield, Va.

Filed Nov. 13, 1963, Ser. No. 323,461

2 Claims. (El. 25h-Md) This invention relates to the making of openingsin molded structures, and relatespart-icularly to a molding assemblywhich is used for such purposes.

In the making of molded structures, such as the poured concrete floorsof buildings and the like, it is often necessary to provide an openingthrough which electrical conduits, piping and similar lines may bepassed. The usual practice in such instances is to use a lhollow form,such as a cylindrical member which is fixed to the mold board on whichthe poured .concrete is supported, so that it protrudes above the top ofthe concrete.

One current practice employed in the building industry is to useremovable molding forms, which are emplaced on the mold board prior topouring of a concrete floor, and then later lare removed after` theconcrete has hardened.

The devices currently used present a problem in that they are notinstalled as quickly as desired, nor can they be removed without somedifficulty. This invention contem-plates the solving of both suchproblems, inV that it is readily installed with a minimum of effort, andis quickly removed after the concrete floor has hardened. The moldingassembly contemplated is also reusable indefinitely.

Accordingly, it is one of the principal objectives of myY invention toprovide an assembly which can quickly and readily be installed on a moldboard prior to pouring of the molding material.

' A further objectrof :this invention is to provide a molding assemblywhich can accurately be positioned at a desired location with `a minimumof effort.

A still further object of this invention is to make i-t possible toeasily remove the molding assembly after the ber prior to setting of themolding material, but which Y thereafter is quickly unlocked to permitslight collapse of the molding member, so that the molding assembly iseasily removed. Y

These and still further objects and advantages of my invention reside inthe details of construction, arrangement, combination of the variousparts of my aperture forming mold for molded structures as hereinaftermore fully set forth, and as specifically pointed out in my claims, andillustrated in the accompanying drawings, in which:

FIGURE l shows an elevational view of the molding assembly in positionwith the molding material therearound.

FIGURE 2 shows a cutaway elevational view indicating the innerarrangement of this invention.

FIGURE 3 shows a cross-sectional view of the assembly of FIGURE 2 alongthe lines 3--3.

FIGURE 4 shows a perspective view of the mold assembly ready forinstallation.

ilhih Patented Feb. 23, 1965 Y ICC ld forms a hollow cylindrical moldmember having top and bottom edges ll7 and i3 respectively.

The [hollow mold member lil isimounted in upright position on amold-board 12, with the bottom edge 18 thereof mounted on the uppersurface i4 of mold member l2.

Cement or other similar type of molding material generally indicated atC is poured around the mold member and supported on the mold-board l2,so that after the molding material has set, an opening will be left whenthe hollow cylindrical mold member l@ is removed.

The hollow cylindrical mold member l@ has a pressure block 2t) which hasits lower surface 22 in direct Contact with the upper edge 17 of thehollow mold member lil. An opening 24 through the block 20 permitssupport rod 30 to pass therethrough. The block Ztl, as indicated at 26,overhangs the outer circumference of the hollow `molding member lil.

The support rod 3@ has a central shank 32 which extends through the bodymember and down through the opening 44 in support bracket l-tl, the lctter having a flange 42 which is fixed to the inner wall of the hollowbody member l0. The lower end 34 of the support rod unit 3i? has athreaded section 34 which is fitted into and engages the periphery ofopening 13 in the mold-board l2.

A handle 36 provides the means for an operator to turn the support rod3d to screw the threaded section 34 down through the opening 13. Whenthe rod is screwed down to its final position, the stop washer 38 willengage the upper surface 23 ofthe pressure block 2t?, so that thesupport rod, through the pressure block 2li exerts a force on the upperedge 17 of the body member to thereby force the lower edge 18 into rigidtight` engagement with the upper surface 14 of the pressure board.

The connecting member di) holds the support rod 39 in proper alignmentwith respect to the hollow mold member 1d. The shank 32 of rod 3@ passesthrough the open-V ing 44 in the connecting member dil, the connectingmember being disposed in a generally horizontal or transverse position.The connecting member has a flange ft2 which is fixed to the inner wallof the hollow mold member lt?. The hollow mold member lt) is madecollapsible to some degree by having the two edge sections l5 and loslidably with respect to each other under normal conditions. A lockingarrangement employing two pair of bracket members and a pin connectionis used to prevent relative movement ofthe edge sections l5 and 16during molding. This arrangement is an extremely simpleand effective wayof locking the overlapping edges l5 and 16 in desired position formoidingtand also permits use 0f a simple release so that the hollow moldmember may be slightly collapsed to free it from the hardened moldedstructure after setting. Y

The upper pair of fastening bracket members include transverselyextending plates et? and 62, a shown in FIG- URES 2 and 3. The upperbracket plate 60 has a perpendicularly disposed support piece 64 whichis attached to the end wall of the hollow mold member it) at a position`substantially displaced from the inner edge le as shown in FGURE 3.Member dil extends directly across and behind the overlapping edges andhas an opening 6d through which the locking rod 5t) is passed. Bracketplate 62 is similar to bracket plate 6d, being a flat plate with anopening 63. It is attached to the inner surface of mold member lil at aposition substantially spaced from the edge l5 and extends across behindthe overlapping edges l5 and le to underlie plate bracket 62. Theopening 68 is positioned so that when openings 66 and d8 are in line theside edges 15 and 16 will be held in locked overlapping position readyfor pouring of the molding material. The upper pair of bracket members60 and 62 are positioned near the upper edge 17 of the hollow moldmember 10.

A lower pair of fastening bracket members 70 and 72 of similarconstruction to the upper pair of bracket members are located adjacentthe lower edge 18 of the mold member and directly below the upper pairof bracket members. Plate bracket members 70 and 72 have openings 76 and'78 arranged to coincide when the lower position of the edges 15 and 16are in correct overlapping position for pouring of the mold material.Plate bracket 72 is fixed to the inner wall of the mold member 10 by adepending flange 75 which is welded as indicated at 79 to the wall at a:point displaced from the inner edge 16. The plate bracket '72 extendsacross and behind the overlapping edges 15 and 16 and is positionedunder the plate bracket 70 which is fixed to the inner wall of thehollow mold member at a point displaced from the edge 15.

The locking of the edges and 16 in correct position is accomplishedmerely by inserting the rod 50 with its tapered end 54 through the upperopenings 66 and 68 of plate brackets 60 and 62 and then down and throughthe lower openings 76 and 78 of plate brackets 70 and 72. The lockingarrangement makes a rigid cylindrical mold which will not collapse underpressure of the molding material.

When the rod is to be removed, the handle portion 52 is grasped and therod withdrawn yfrom the upper and lower brackets.

in operation the mold board 12 is first drilled with a plurality ofholes such as shown at 90 and 92 in FIG- URE 4, these holescorresponding to the hole 13 shown in FIGURE 2.

The operator first aligns the locking bracket openings by expanding thehollow mold member slightly, and then inserts the rod 50 through thealigned openings 64 and 68 of the upper pair of plate brackets and theopenings 76 and '78 of the lower pair of plate brackets so that thehollow mold member is reinforced by a rigid connection imnediatelybehind the free and overlapping side edges 15 an 16.

The operator then places the shank 32 of the support rod through theopening 24 of the pressure block, and then inserts the lower portions 34of the support rod 30 through the opening 44 of the bracket 40. Theaperture mold assembly is now ready for installation, and the operatoras shown in FIGURE 4 takes a sight along sight line 80 so that thetapered engaging section 34 of support rod 3i) is inserted in the hole92. The entire assembly is then moved to an upright position with thesupport rod generally disposed perpendicular to the surface 14 of themold board 12. The handle 36 is then rotated by the operator so that thescrew threaded engaging section 34 bites down into the hole 92 andeffects a locked selfsupporting arrangement as -indicated in FIGURES land 2 wherein the support rod 30 pulls the pressure block 26 into firmengagement with the mold member and lower edge 18 of mold member 10 ispressed into firm engagement with the upper surface of the mold board12.

While the invention has been described in connection with a preferredembodiment thereof, it will be understood that it is capable of furthermodification, and this application is intended to `cover any variations,uses, or adaptations of the invention following, in general, theprinciples of the invention and including such departures from thepresent disclosure as come within known or customary practice in the artto which the invention pertains, and as may be applied to the essentialfeatures hereinbefore set forth and as fall within the scope of theinvention or the limits of the appended claims.

Having thus described my invention, I claim:

1. An aperture forming mold assembly for molded structures, comprising,an elongated hollow mold member of sheet material having a closedcross-sectional configuration with open top and bottom ends, said hollowmold member being split longitudinally, with the adjacent side edgesoverlapping each other, a pressure block with an opening therethroughwhich has a flat lower surface which lays across and engages theperiphery of the open top of said hollow mold member, a support rod ofsubstantially greater length than said hollow mold member which extendsthrough the said opening of said pressure block and longitudinallythrough the said hollow mold member, said rod having a threaded sectionwhich extends below said open bottom end to engage a mold-board, asingle plate bracket member integral with the inner surface of saidhollow mold member and having an opening through which said support rodextends, said bracket being positioned immediately adjacent said bottomend of mold member, the upper end of said support rod having a handle tofacilitate turning thereof, said rod also having a stop means integraltherewith located immediately above and in contact with said pressureblock, whereby turning of said handle will cause said thread to draw thesaid rod toward said mold board to press said pressure block against thetop of said hollow mold member causing the bottom end thereof to bepressed against said mold board to hold said hollow mold member in firmupright position with respect to said mold board, two pair of fasteningbrackets within said hollow mold member, one bracket pair adjacent thetop end and the other bracket pair adjacent the bottom end of the hollowmold member, a bracket of each ofV said bracket pairs being immediately`adjacent one of said overlapping side edges yand spaced a smalldistance therefrom, the remaining bracket of each of said bracket pairsbeing similarly positioned with respect to the other of said side edges,to permit the overlapping edges to slide freely 'with respect to eachother Without interference from the brackets when said cylinder is`slightly collapsed, said brackets being L-shaped pieces one leg ofwhich is attached to the yinner surface of said mold member, the other-leg extending outwardly from said surface transversely across saidhollow mold member and having an opening therein, said openings beingaligned with the opening in the corresponding leg of its other pairedbracket when said side edgesV of the hollow mold member are inoverlapping contact, the aligned holes in both bracket pairs being in astraight line, a locking rod which extends down through said alignedholes and is shorter than the ylength of said hollow mold member, saidrod connecting the paired brackets to support and lixedly hold theoverlapping edges of the hollow mold member together, said rod whenremoved permitting the voverlapping edges to slide with respect to eachother to slightly collapse said hollow mold member for easy removalthereof from the hardened molded structure.

2. The aperture forming mold assembly as set forth in claim l, whereinsaid brackets are made of sheet material and are welded to said hollowmold member.

References Cited in the file of this patent UNITED STATES PATENTS861,106 Georgenson July 23, 1907 867,129 Hart et al Sept. 24, 19071,171,641 Priest Feb. l5, 1916 1,212,021 Cress Jan. 9, 1917 1,746,696DOWS Feb. 11, 1930

1. AN APERTURE FORMING MOLD ASSEMBLY FOR MOLDED STRUCTURES, COMPRISING,AN ELONGATED HOLLOW MOLD MEMBER OF SHEET MATERIAL HAVING A CLOSEDCROSS-SECTIONAL CONFIGURATION WITH OPEN TOP AND BOTTOM ENDS, SAID HOLLOWMOLD MEMBER BEING SPLIT LONGITUDINALLY, WITH THE ADJACENT SIDE EDGESOVERLAPPING EACH OTHER, A PRESSURE BLOCK WITH AN OPENING THERETHROUGHWHICH HAS A FLAT LOWER SURFACE WHICH LAYS ACROSS AND ENGAGES THEPERIPHERY OF THE OPEN TOP OF SAID HOLLOW MOLD MEMBER, A SUPPORT ROD OFSUBSTANTIALLY GREATER LENGTH THAN SAID HOLLOW MOLD MEMBER WHICH EXTENDSTHROUGH THE SAID OPENING OF SAID PRESSURE BLOCK AND LONGITUDINALLYTHROUGH THE SAID HOLLOW MOLD MEMBER, SAID ROD HAVING A THREADED SECTIONWHICH EXTENDS BELOW SAID OPEN BOTTOM END TO ENGAGE A MOLD-BOARD, ASINGLE PLATE BRACKET MEMBER INTEGRAL WITH THE INNER SURFACE OF SAIDHOLLOW MOLD MEMBER AND HAVING AN OPENING THROUGH WHICH SAID SUPPORT RODEXTENDS, SAID BRACKET BEING POSITIONED IMMEDIATELY ADJACENT SAID BOTTOMEND OF MOLD MEMBER, THE UPPER END OF SAID SUPPORT ROD HAVING A HANDLE TOFACILITATE TURNING THEREOF, SAID ROD ALSO HAVING A STOP MEANS INTEGRALTHEREWITH LOCATED IMMEDIATELY ABOVE AND IN CONTACT WITH SAID PRESSUREBLOCK, WHEREBY TURNING OF SAID HANDLE WILL CAUSE SAID THREAD TO DRAW THESAID ROD TOWARD SAID MOLD BOARD TO PRESS SAID PRESSURE BLOCK AGAINST THETOP OF SAID HOLLOW MOLD MEMBER CAUSING THE BOTTOM END THEREOF TO BEPRESSED AGAINST SAID MOLD BOARD TO HOLD SAID HOLLOW MOLD MEMBER IN FIRMUPRIGHT POSITION WITH RESPECT TO SAID MOLD BOARD, TWO PAIR OF FASTENINGBRACKETS WITHIN SAID HOLLOW MOLD MEMBER, ONE BRACKET PAIR ADJACENT THETOP END AND THE OTHER BRACKET PAIR ADJACENT THE BOTTOM END OF THE HOLLOWMOLD MEMBER, A BRACKET OF EACH OF SAID BRACKET PAIRS BEING IMMEDIATELYADJACENT ONE OF SAID OVERLAPPING SIDE EDGES AND SPACED A SMALL DISTANCETHEREFROM, THE REMAINING BRACKET OF EACH OF SAID BRACKET PAIRS BEINGSIMILARLY POSITIONED WITH RESPECT TO THE OTHER OF SAID SIDE EDGES, TOPERMIT THE OVERLAPPING EDGES TO SLIDE FREELY WITH RESPECT TO EACH OTHERWITHOUT INTERFERENCE FROM THE BRACKETS WHEN SAID CYLINDER IS SLIGHTLYCOLLAPSED, SAID BRACKETS BEING L-SHAPED PIECES ONE LEG OF WHICH ISATTACHED TO THE INNER SURFACE OF SAID MOLD MEMBER, THE OTHER LEGEXTENDING OUTWARDLY FROM SAID SURFACE TRANSVERSELY ACROSS SAID HOLLOWMOLD MEMBER AND HAVING AN OPENING THEREIN, SAID OPENINGS BEING ALIGNEDWITHE THE OPENING IN THE CORRESPONDING LEG OF ITS OTHER PAIRED BRACKETWHEN SAID SIDE EDGES OF THE HOLLOW MOLD MEMBER ARE IN OVERLAPPINGCONTACT, THE ALIGNED HOLES IN BOTH BRACKET PARIS BEING IN A STRAIGHTLINE, A LOCKING ROD WHICH EXTENDS DOWN THROUGH SAID ALIGNED HOLES AND ISSHORTER THAN THE LENGTH OF SAID HOLLOW MOLD MEMBER, SAID ROD CONNECTINGTHE PAIRED BRACKETS TO SUPPORT AND FIXEDLY HOLD THE OVERLAPPING EDGES OFTHE HOLLOW MOLD MEMBER TOGETHER, SAID ROD WHEN REMOVED PERMITTING THEOVERLAPPING EDGES TO SLIDE WITH RESPECT TO EACH OTHER TO SLIGHTLYCOLLAPSE SAID HOLLOW MOLD MEMBER FOR EASY REMOVAL THEREOF FROM THEHARDENED MOLDED STRUCTURE.